injector question

[kernan240sx]

a shop replaced one of my injectors and put new o-rings on all injectors. now my car is running really badly, having bad starts, running rough, high idle, and it is getting flooded. Do you think that the shop is to blame, or probably not?

[vancouverbc]

sounds like they scratched the o-rings

a shop replaced one of my injectors and put new o-rings on all injectors. now my car is running really badly, having bad starts, running rough, high idle, and it is getting flooded. Do you think that the shop is to blame, or probably not?

[94_240sx]

sounds like they scratched the o-rings

Most likely. Or they crushed o-rings. Yes, shop is to blame. I hope they didn't scratch the fuel rail.

[1Johnboy]

First see if the shop will fix the problem. Since the car was running worse after changing only 1 injector, means that the remaining injectors are still fine. If they will not fix things then read on. I had the same problem, it turned out to be corrosion on the injector connectors. Start the engine and wiggle each connector to see if the engine starts to smooth out. If it does not, then the contacts might need cleaning. A good indicator of corrosion is broken or cracked wiring boots. Once the boots crack, crud will work it's way into the contact area. You can make a contact removal tool real easily out of a stiff piece wire bent like a horseshoe. You insert the wire in the square slot and gently push to release the connector locking pin. Release both connectors at the same time. It's lots cheaper to clean the contacts than to buy a set of injectors. My contacts were green with corrosion. I used Brass cleaner from a gun shop, oven cleaner and CRC brake cleaner, but finally reasorted to a fine wire brush. The injector pins were also cleaned and a coat of silicon grease was applied to the cleaned contacts to stop further corrosion. If you have a fuel leak, the Viton o-rings come from McMaster-Carr and cost 33 cents each. I made new boots from silicon tubing, 3/8 ID x 1/16 wall about 2" long stretched over the connector after I cut the old boots off. Original boots are not available from what I found.Good Luck1johnboy

[duffman1278]

Yup, thats most likely the shops error. You should -just replace them yourselves, its real easy. Pop them out-take out old o-rings-lubricate new o-rings in oil-put them onto the injector-"pop" the injector back in using a 6 or 7mm socket on top of the injector-put fuel rail back in